Index: node_modules/postcss/lib/input.d.ts
===================================================================
--- node_modules/postcss/lib/input.d.ts	(revision 2058e5c694bb6097866a5fe6503c519e8f74970f)
+++ node_modules/postcss/lib/input.d.ts	(revision 2058e5c694bb6097866a5fe6503c519e8f74970f)
@@ -0,0 +1,227 @@
+import { CssSyntaxError, ProcessOptions } from './postcss.js'
+import PreviousMap from './previous-map.js'
+
+declare namespace Input {
+  export interface FilePosition {
+    /**
+     * Column of inclusive start position in source file.
+     */
+    column: number
+
+    /**
+     * Column of exclusive end position in source file.
+     */
+    endColumn?: number
+
+    /**
+     * Line of exclusive end position in source file.
+     */
+    endLine?: number
+
+    /**
+     * Offset of exclusive end position in source file.
+     */
+    endOffset?: number
+
+    /**
+     * Absolute path to the source file.
+     */
+    file?: string
+
+    /**
+     * Line of inclusive start position in source file.
+     */
+    line: number
+
+    /**
+     * Offset of inclusive start position in source file.
+     */
+    offset: number
+
+    /**
+     * Source code.
+     */
+    source?: string
+
+    /**
+     * URL for the source file.
+     */
+    url: string
+  }
+
+  // eslint-disable-next-line @typescript-eslint/no-use-before-define
+  export { Input_ as default }
+}
+
+/**
+ * Represents the source CSS.
+ *
+ * ```js
+ * const root  = postcss.parse(css, { from: file })
+ * const input = root.source.input
+ * ```
+ */
+declare class Input_ {
+  /**
+   * Input CSS source.
+   *
+   * ```js
+   * const input = postcss.parse('a{}', { from: file }).input
+   * input.css //=> "a{}"
+   * ```
+   */
+  css: string
+
+  /**
+   * Input source with support for non-CSS documents.
+   *
+   * ```js
+   * const input = postcss.parse('a{}', { from: file, document: '<style>a {}</style>' }).input
+   * input.document //=> "<style>a {}</style>"
+   * input.css //=> "a{}"
+   * ```
+   */
+  document: string
+
+  /**
+   * The absolute path to the CSS source file defined
+   * with the `from` option.
+   *
+   * ```js
+   * const root = postcss.parse(css, { from: 'a.css' })
+   * root.source.input.file //=> '/home/ai/a.css'
+   * ```
+   */
+  file?: string
+
+  /**
+   * The flag to indicate whether or not the source code has Unicode BOM.
+   */
+  hasBOM: boolean
+
+  /**
+   * The unique ID of the CSS source. It will be created if `from` option
+   * is not provided (because PostCSS does not know the file path).
+   *
+   * ```js
+   * const root = postcss.parse(css)
+   * root.source.input.file //=> undefined
+   * root.source.input.id   //=> "<input css 8LZeVF>"
+   * ```
+   */
+  id?: string
+
+  /**
+   * The input source map passed from a compilation step before PostCSS
+   * (for example, from Sass compiler).
+   *
+   * ```js
+   * root.source.input.map.consumer().sources //=> ['a.sass']
+   * ```
+   */
+  map: PreviousMap
+
+  /**
+   * The CSS source identifier. Contains `Input#file` if the user
+   * set the `from` option, or `Input#id` if they did not.
+   *
+   * ```js
+   * const root = postcss.parse(css, { from: 'a.css' })
+   * root.source.input.from //=> "/home/ai/a.css"
+   *
+   * const root = postcss.parse(css)
+   * root.source.input.from //=> "<input css 1>"
+   * ```
+   */
+  get from(): string
+
+  /**
+   * @param css  Input CSS source.
+   * @param opts Process options.
+   */
+  constructor(css: string, opts?: ProcessOptions)
+
+  /**
+   * Returns `CssSyntaxError` with information about the error and its position.
+   */
+  error(
+    message: string,
+    start:
+      | {
+          column: number
+          line: number
+        }
+      | {
+          offset: number
+        },
+    end:
+      | {
+          column: number
+          line: number
+        }
+      | {
+          offset: number
+        },
+    opts?: { plugin?: CssSyntaxError['plugin'] }
+  ): CssSyntaxError
+  error(
+    message: string,
+    line: number,
+    column: number,
+    opts?: { plugin?: CssSyntaxError['plugin'] }
+  ): CssSyntaxError
+  error(
+    message: string,
+    offset: number,
+    opts?: { plugin?: CssSyntaxError['plugin'] }
+  ): CssSyntaxError
+
+  /**
+   * Converts source line and column to offset.
+   *
+   * @param line   Source line.
+   * @param column Source column.
+   * @return Source offset.
+   */
+  fromLineAndColumn(line: number, column: number): number
+
+  /**
+   * Converts source offset to line and column.
+   *
+   * @param offset Source offset.
+   */
+  fromOffset(offset: number): { col: number; line: number } | null
+
+  /**
+   * Reads the input source map and returns a symbol position
+   * in the input source (e.g., in a Sass file that was compiled
+   * to CSS before being passed to PostCSS). Optionally takes an
+   * end position, exclusive.
+   *
+   * ```js
+   * root.source.input.origin(1, 1) //=> { file: 'a.css', line: 3, column: 1 }
+   * root.source.input.origin(1, 1, 1, 4)
+   * //=> { file: 'a.css', line: 3, column: 1, endLine: 3, endColumn: 4 }
+   * ```
+   *
+   * @param line      Line for inclusive start position in input CSS.
+   * @param column    Column for inclusive start position in input CSS.
+   * @param endLine   Line for exclusive end position in input CSS.
+   * @param endColumn Column for exclusive end position in input CSS.
+   *
+   * @return Position in input source.
+   */
+  origin(
+    line: number,
+    column: number,
+    endLine?: number,
+    endColumn?: number
+  ): false | Input.FilePosition
+
+  /** Converts this to a JSON-friendly object representation. */
+  toJSON(): object
+}
+
+declare class Input extends Input_ {}
+
+export = Input